Hydraulics & Fluid Mechanics
According to Bernoulli’s equation for steady ideal fluid flow

velocity and pressure are inversely proportional
total energy is constant throughout
the energy is constant along a stream-line but may vary across streamlines
principle of conservation of mass holds

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Hydraulics & Fluid Mechanics
Two dimensional flow occurs when

the magnitude and direction of the velocity do not change from point to point in the fluid
the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
the direction and magnitude of the velocity at all points are identical
the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

parabolic distribution across the section
constant over the cross section
zero at the mid plane and varies linearly with distance from mid plane
zero at plates and increases linearly to midpoint

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